Issue 20 proposal

I took an action last time to propose an amendment to Danny proposal in
JIRA. Here it is:

It is possible to use WS-BPEL processes in conjunction with SCA, while
the processes have no knowledge of SCA. A few SCA concepts are only
available to WS-BPEL processors that support SCA specific extensions.
The capabilities that require knowledge of SCA are provided by an SCA
extension, whose namespace is
"http://docs.oasis-open.org/ns/opencsa/sca-bpel/200801".

Whether this extension is mandatory or optional
is specified by the mustUnderstand attribute as described in [section
14 of bpel spec].

An example of using the namespace in a BPEL process is as
follows:

An example, where the SCA extension is mandatory,
is as follows:

<process ...>

   <extensions>

      <extension

        
namespace="http://docs.oasis-open.org/ns/opencsa/sca-bpel/200801"

         mustUnderstand="yes" />

   </extensions>

   ...

</process>